To add to the use-cases mentioned for this feature...
When my kids were younger, when they were at my house we'd play board games or cards, kick a ball at the park, stuff like that. Now they're older and into video games, but not old enough for some of the content in this game. When they're here these days, mostly we just all play games, and I would *love* the option to take a game from R to PG-13 when they're here, because otherwise I wouldn't be able to play it while they're doing Minecraft two feet away.
